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Apparatus and method for manufacture of paper and cardboards

A technology of cardboard and spraying equipment, which is applied in the direction of paper, wetting equipment, papermaking, etc., and can solve problems such as forming errors

Inactive Publication Date: 2013-03-13
VALMET TECH OY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In some cases spraying devices can cause forming errors on the web

Method used

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  • Apparatus and method for manufacture of paper and cardboards
  • Apparatus and method for manufacture of paper and cardboards
  • Apparatus and method for manufacture of paper and cardboards

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Experimental program
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Embodiment Construction

[0051] It is worth noting that the shown figures are not exactly to scale, they are only used to illustrate different embodiments of the invention.

[0052] exist figure 1 A spraying device 10 is shown in , which has two oppositely loaded pressing members, a first roll 1 and a second roll 2 . The extrusion members 1 , 2 form an extrusion nip 3 between them. The paper or cardboard web 6 is introduced into the press nip when a glue mixture with a higher solids content is to be sprayed onto the web. The spraying device 10 has a first nozzle 4 and / or a second nozzle 5 upstream of the extrusion nip. Using the glue mixture, the web is treated with glue on one or both sides by means of the first nozzle 4 and / or the second nozzle 5 .

[0053] The size is preferably sprayed on the web prior to the extrusion nip by means of a spraying device with nozzles.

[0054] It is also possible to use one or more belts as extrusion members. Preferably the belt is guided through the roll nip. ...

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PUM

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Abstract

The invention provides an apparatus for manufacture of paper and cardboards. The apparatus comprises a spray application plant (10) comprising spray nozzles (4, 5) for spraying an adhesive composition to at least one surface of a trajectory (6) and a press nip (3) for pressing the trajectory after the spraying of the adhesive composition, where the press nip is formed by two mutually resilient rotatable press elements (1, 2). The apparatus also comprises a first drying plant (20) before the spray application plant (10) for drying the trajectory, before spray application. The arrangement before the spray application plant (10) comprises a humidifying plant (11, 12), in which the trajectory (6) is configured before the spray application to profile with moisture, and when the inlet moisture of the trajectory before the spray application plant is 15%, the humidifying plant configured the trajectory on the intake moisture of 15-50% before the spray application to moisturize. The invention also relates to a method for manufacture of the paper and cardboards.

Description

technical field [0001] The invention relates to an apparatus for producing paper and board and a method for producing paper and board. The invention relates particularly, but not exclusively, to the control of the strength properties of paper and board during spray-surface sizing. Background technique [0002] It is desirable to treat paper or board with a liquid glue that increases the strength of the paper web at certain points in the manufacturing process, such as fine-grained paper or outer packaging board, such as the surface of corrugated board or corrugated (fluted) Cardboard (linear). The treatment of the web with glue primarily affects the strength properties of the final product. Most Different Kinds of Starches Both can be used as sizing compounds to which many different types of additives can be mixed. The invention is not limited to a particular size mixture, size being understood here as all mixtures which are at least partly imbibed into the web to be tre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): D21G7/00D21H23/50
CPCD21F7/003D21G7/00D21H23/50D21H23/26D21H21/16D21F11/00
Inventor 珀特里·里斯托拉斯蒂格·伦瓦尔托皮·廷屈宁
Owner VALMET TECH OY
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